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Nature of Operations and Summary of Significant Accounting Policies - Computation of Basic and Diluted Net Loss Per Share (Detail) (USD $)
12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2011
Earnings Per Share Basic And Diluted [Abstract]      
Net loss $ (7,275,706) $ (7,839,996) $ (125,057)
Weighted-average common shares and share equivalents outstanding-basic 27,492,670 25,124,179 21,506,508
Effect of dilutive stock options         
Weighted-average common shares and share equivalents outstanding-diluted 27,492,670 25,124,179 21,506,508
Net loss per share - basic $ (0.26) $ (0.31) $ (0.01)
Net loss per share - diluted $ (0.26) $ (0.31) $ (0.01)